308 Chronicles of Science. [A-pril, 



M. E. Peligot points out the many relations that subsist between 

 chrome iron-ore and magnetic oxide of iron.* 



Von Lasaulx announces the discovery of tridymite in trachytic 

 nodules occurring in a kind of hornstone rock from Alleret, in the 

 department of Haute-Loire.f 



One of Dr. Blum's valuable contributions to the study of 

 pseudomorpliism has recently appeared, t and contains the results 

 of his observations on materials that have accumulated since his 

 last publication. 



Several new Swedish minerals have been described by C. W. 

 Blomstrand from near Westana, in Schonen.§ Most of these are 

 hydrous phosphates of alumina, more or less akin to "Wavellite. 

 They have received the names of Berlinite, TroUeite, AugeJite, 

 Attaholite, and Kirrolite. A hydrous siHcate of alumina, named 

 Westanite, has the following composition : — 



2 Alj O3 . 3 Si Oj + HO. 



Dr. Petersen of Darmstadt applies the name of Hi/drotachjlyte 

 to an amorphous mineral found in the basalt of Rossdorf, near 

 Darmstadt. II It is a hydrous silicate containing alumina, sesqui- 

 oxide of iron, jDotash, soda, magnesia, lime, and the protoxides of 

 iron and manganese. A portion of the silica is apparently replaced 

 by titanic acid. 



10. MINING, METALLUEGY, AND RECENT 

 LITERATURE. 



Mining. 



The Stannary Court of Cornwall and Devonshire is nearly the 

 oldest — if not actually the oldest — court existing in this country, 

 with almost all its original constitution preserved, and with its forms 

 unaltered. Dating from the time of John, who granted a charter 

 of special privileges to the tinners, and taking a more perfect 

 organization in the third year of Edward I., the Court of the 

 Stannaries has remained until now Avithout any special alteration. 

 Carew tells us that " upon suit made to Edmonde, Earl of Corn- 

 wale, Sonne to Richard, King of the Romans, they obtained from 

 him a charter with sundrie privileges; amongst which it was 

 granted them to keep a court and hold plea of all actions (life, 

 lymme, and land excepted), in consideration whereof the said lords 



* ' Annales de Chimie et de rhysique,' Jan., 18G9, pp. 90, 100. 

 t Loonhurd tmd Geinitzs ' Jalirbuch.' )8G9. Heft I., p. G7. 

 X Lemilinrd iiiid Gcinitz's 'Jahilmcli.' 1S68. Hcl't VII., p. 805. 

 § 'Journal fill- piaktische Chiniio.' Bd. cv., No. 22, p. 337. 

 il Leonhard u. Guinitz's ' Jidirl)ticli,' 18G9, p. 32. 



